Hydraulic press



Sept. R. W. DINZL. v HYDRAULIC PRESS Filed Oct. 4, 1935 s Sheets-Sheet 1 Sept. 19, 1939. R w. 0mm, Y 2,173,086

- HYDRAULIC PRESS Filed Oct. 4, 1935 3 Sheets-Sheet 2 INVENTOR 7 Z 14 D/hz/ Sept, 19, 1939. I R. w. mN'zL 2,173,086

HYDRAULIC PRES S Filed Oct. 4, 1935 3 Sheets-Sheet 3 INVENTOR E. W D/hz/ Patented Sept. 19, 1939 UNITED STATES PATENT OFFICE nrnmumc rnnss Delaware Application October 4, 1935, Serial No. 43,605

3 Claims.

This invention relates generally to hydraulic presses and more particularly to a hot plate press. It isan object of my invention to'provide a press in which the elements are so combined that the press is not only relatively simple, compact and sturdy but is also economical in construction, maintenance and operation. A further object is to provide an improved combination where- I by the various parts are readily accessible notwithstanding the compact arrangement of the press. A further object is to provide an improved combination of press elements whereby they structurally and functionally cooperate to permit certain elements to perform a multiplicity of 10 functions and thereby minimize the cost of the apparatus as well as rendering it compact. A still further object in this respect is to provide a compact unit through which air is circulated for cooling purposes by an improved and simplified air circulating combination.

Other objects and advantages will be more apparent to those skilled in the art from the following description of the accompanying drawings in which:

Fig. 1 is a vertical sectional view taken on the Fig. 4 is a horizontal section taken on the line 4--4 of Fig. 1; g

Fig. 5 is an enlarged elevational view showing the construction of the rams.

In the particular embodiment of the invention which is disclosed herein-merely for the purpose of illustrating one specific form among possible others that the invention might take in practice, I have shown in Fig. 1 a pair of side frame memhers I and 2, these members being preferably flat slab steel extending for the full height of the .machine and defining substantially the full width thereof as indicated by their vertical edges M, Fig. 2. The sideplates are supported upon a plate metalbase 4 and held in spaced'relatlon by vertical and horizontal p ate metal members 5 and 6 all of which are welded together whereby a pump sump 1 has its bottom formed by base plate 4 and its end walls by the side frame members.

A cast cylinder block generally indicated at 8 is provided at each of its ends, Fig. 4, with a recess 9, thereby forming a pair of arms on which are formed lateral projections or keys 10 disposed within suitable transverse keyways H in the inner 3 faces of the frame sides I and 2. The cylinder casting and frame sides are secured together in any suitable manner such as by bolts. Supported between and bythe upper ends of side members I and 2 is a stationary platen it having transverse keys I 4 seated within keyways I! in the inner faces 5 of the side members.

scribed. As shownin Fig. 3, a vertical guide block 5 22 is secured to or formed on the end of platen 20 and projects as shown in Fig. 1 a substantial distance below the bottom thereof as generally indicated at 23. Any suitable lateral brace 24 is provided to support the depending portion ofthe l0 guide. This guide has a groove 2| preferably tapered as shown in Fig. 3 to ride upon a complementary shaped vertical guideway 25. Guideway 25 is secured to the inner face of the frame side member by a bolt 26, although a series of screws 25 21 are provided to'adjust the guideway 25 inwardly or outwardly. After any adjustment has been made, .bolt 26 is tightened. The guides and guideways are preferably of the substantial length as described, and in order to accomplish this in a 30 I have formed a control valve directly in the 40 come damaged or get out of alignment. Valve 50 29 can be operated by any suitable hand lever 32. If desired, a finer degree of adjustment can be obtained by an auxiliary valve it operated by a hand wheel- 34 to control auxiliary ports 35. The two valves are thereby arranged to control flow of fluid from a supply passage 36 through the horizontal cylinder passage 31 as by bypassing fluid therefrom to return pipe 31a.

In order to further obtain as high a degree of compactness as possible, I have placed a pump 40 and its motor 4| directly beneath the cylinder block and utilize a base 42 of the motor pump unit as a cover for sump I. As a result of this arrangement, the discharge pipe 43 of the pump may be connected to pipe 36 with minimum connections.

In order to effectively dissipate heat that might be transmitted from the hot plates 44 and 45 to the cylinder block and pumping mechanism, I circulate air around the cylinders and pump. To accomplish this efliciently in a simple and compact manner, I utilize side plate 2 not only as a support for a motor fan unit 46 but also as one wall of an internal air chamber and also form an air inlet opening 41 in the side plate. A sheet metal panel 48, Fig. 2, is secured to and extends entirely between the rear edges of side plates l and 2 and also extends from base plate 4 to the uppermost edge of the cylinder block 8. A front sheet metal panel 49 is similarly secured to the front edges of side plates l and 2, although this front panel has a series of louvered discharge openings 50. Air is circulated by fan 46 through opening 41 and around the motor-pump unit and then upwardly and outwardly through the openings 50 which extend for the full width of panel 3, it being noted in Fig. 2 that the openings are adjacent the front portion of pockets 50a in the cylinder casting. These pockets extend entirely around and between the cylinders and communicate with the end openings 5 thereby providing a complete air circulating passage through the cylinder block. Also, air will flow vertically through the cylinder block end openings 9, thus preventing excessive heating of the guide and guideways and thence discharge to the atmosphere around the underside of the movable platen 20. As a result of this improved cooling system, the guide and guideways require minimum clearance which is conducive to a higher degree of accuracy and also it is easier to maintain a proper fllm of lubricant on the guiding surfaces.

To accomplish the foregoing described high degree of compactness of the press without, however, sacrificing the accessibility of the working parts for purposes of repair or inspection, I have so constructed and arranged the rams and the surrounding press structure that the rams may be conveniently removed without dismantling the press. When the rams are moved upwardly so that hot plates 44 and 45 are in contact, rams I1 and I8 are still within their cylinders in complete operative relation thereto. In order to remove the rams, the operator would first bring the platens 44 and 45 into contact and place a block of wood or other suitable material between the cylinder casting 8 and the underside of platen 20, and then an upper ram section 5!, Fig. 5, would be laterally removed followed by removal of a second ram section 52. The upper ram section is secured to platen 20 by bolts 53, while bolts 54 secure the two ram sections together. As is shown more clearly in connection with one of the diametrically opposed bolts 54, a recess 55 is formed in the sides of the rams. A lateral slot 56 connects the recess with the bottomsurface of the upper section. The recess is also of sufficient height that the bolt may be unscrewed from lower section 52 and laterally removed through slot 56. A similar construction is employed for the bolts 53. Hence upon removal of the bolts 53 and 54, the upper ram section 5| may be laterally removed and thereafter the lower ram section may be raised and laterally removed. To assist the removal of the lower ram section as well as its insertion, the cylinder is preferably cut away at 51. Hence the ram packing 58 may be inspected or replaced without the necessity of either dismantling the platen 20 from its guides or of removing any portion of the press structure or piping connections to the ram cylinder.

From the disclosure it is seen that I have provided a press construction whose component parts cooperate both structurally and functionally in such a manner as to insure maximum compactness combined with sturdiness, accuracy and simplicity of operation, all at a minimum cost of manufacture, maintenance and operation.

I claim:

1. A hydraulic press comprising, in combination, a base, a pair of slab side frame members extending continuously from said base to the top of said press, a stationary platen rigidly secured to the upper end portion of said side members, a cast cylinder block of substantial height and substantially equal to the width of said side members and having vertically extending end openings interposed between the front and back edges of said block immediately adjacent said side frame members thereby providing U-shaped end portions on the cylinder block for engagement with the side frame members, means for rigidly securing said cylinder block to said side members at a vertically intermediate point thereof, a cylinder formed in said bloclgand having a lower cylinder head, a ram in said cylinder, a movable platen supported on said ram and located beneath said stationary platen, guide means carried by said movable platen adjacent said side frame members and adapted to project downwardly into said vertical end openings of the cylinder block, and guide elements associated with the inner faces of said side frame members for cooperation with said guide means.

2. A hydraulic hot plate press comprising, in combination, relatively wide flat side members, a stationary upper platen supported thereby, a cylinder block substantially equal to the depth of said side members and supported thereby at an intermediate portion thereof below said stationary platen and having vertically extending end openings adjacent said members, a cylinder formed in said block, a ram in said cylinder, a platen supported by said ram beneath said stationary platen, hot plates supported on said platens, a motor-pump unit disposed between said side members beneath said cylinder block for supplying operating fluid to said cylinder, and means for circulating air around said motor-pump unit and through said end openings to cool said motor and minimize transfer of heat from the hot plate to the cylinder and ram elements, said circulating means including an air opening in one of said side members adjacent said motor-pump unit and a motor fan unit supported by said latter frame member adjacent said air opening.

3. A hydraulic press comprising, in combination, a base, a pair of slab side frame members extending continuously from said base to the top of said press, a stationary platen rigidly secured to the upper end portion of said side members, a cast cylinder block of substantial height and substantially equal to the width of said side members and having vertically extending recesses 10- cated immediately adjacent said side frame members and disposed between vertical planes containing the front and back edges of said block whereby the remaining end portions of the, cylinder block are for engagement with the side frame members, means for rigidly securing said cylinder block to said side members at a vertically intermediate point thereof, a cylinder formed in said block and having a lower cylinder head, a ram in said cylinder, a movable platen supported on said ram andlocated beneath said stationary platen, guide means carried by said movable platen adjacent said side frame members and adapted to project downwardly into said vertical end recessesof the cylinder block, and guide elements associated with the inner faces of said side frame members tor cooperation with said guide means.

RICHARD W. DINZL. 

